Printing-machine.



w. SCOTT, DEOD. I ED J BOOT'IZEXEOUI OBS PRINTING MACHINE.

APPLIOATIOH rmm Jun 15. 1006.

Patentd Sept. 20, 1910.

. \\\\\\\\\\\\\S bu To all whom it may concern:

UNITED STATES PATENT OFFICE.

WALTER SCOTT, F PLAINFIELD, NEW JERSEY; ISABELLA SCOTT AND DAVID JOHN SCOTT EXECUTORS OF WALTER SCOTT, DECEASED.

PBINTING-MACHIN E.

Be it known that I, WALTER Soo'r'r, a citizen of the United States of America, and

a resident of Plainfield, Union county, New Jersey, have invented certain new and useful Improvements in Printing-Machines, of which the following is a specification.

The present invention relates generally to printing machines, and has more particularly reference to tripping mechanism used in connection therewith.

In printing machines, whether rotary or flat bed, such as two or three revolution or other machines, it is customary to trip the revolution automatically once to each cycle of the machine. This may be done by mov-' ing the form carrying member out of. contact with the impression member, but preferably, and as shown herein, it is accomplished by moving the impression cylinder out of contact with the form carrying member. Means are further provided for interrupting the operation of the automatic means so as to maintain the parts tripped. When this takes place and the supply of ink is not being used, the ink accumulates on the distributing surface and on the form. To overcome the objectionable condition is the object of the present invention.

In a prior application filed on the third day of July, 1905, Serial No. 268,028, there is claimed broadly an ink interrupting means under the control of the automatic tripping means, the parts being so arranged that during the normal operation of the automatic trlp-ping mechanism the ink tripping means remain inoperative, and are only brought into play when the normal operation of the automatic tripping means is interrupted. In that application the ductor roll is the part of the inking apparatus which is influenced by the ink tripping means.

In another companion application filed on the 11th day of July, 1905, Serial No. 269,160, the same principle is preferably, but not necessarily, em loyed to stop the operation of the fountaln roll.

In the present application the operation of the fountain roll is stopped in a specific manner, namely by lifting a pawl out of engagement with its ratchet when theimpression is tripped.

When inking up the form before printing Specification of Letters Patent.

Application filed July 15, 1905.

Patented Sept. 20, 1910.

Serial No. 269,799.

commences, it is desirable to maintain the impression tripped without stopping the supply of ink.

Another feature of the invention resides in providing means whereby the impression can be maintained tripped without stopping the operation of the fountain roll.

Other features of construction will appear as the specification proceeds.

The drawings embody the invention in a suitable form; but it is obvious that changes in construction may be made without departing from the spirit of the invention.

In the said drawings: Figure 1 is a side elevation of a two revolution printing machine showing the invention applied to this structure. Fig. 2 is a view looking in the direction of the arrow 2 in Fig. 1, showing certain details and partly in section. Figs. 3 and 4 are plan detail views of the fountain roll and adjacent elements. Fig. 5 is a plan detail view of the means for rendering the ink tripping mechanism inoperative.

Similar characters of reference indicate corresponding parts in the different views.'

1 indicates a framework of any suitable construction for properly supporting the parts comprising the machine.

2 indicates the impression cylinder carried by the journal 3. This journal 3 is mounted in the sliding frames or standards 4, one at each side of the machine, but only one of which is seen. The form carrying means in the present instance consist of the reciprocating bed 5 on which is mounted the plate or type or other means constituting the form 6.

7 and 8 indicate two groups of distributing rolls such as are usually employed in machines of this character, and adjacent to the group of distributing rolls is a fountain 9 in which is located the fountain roll 10.

Mounted on the fountain roll shaft 11 is a ratchet 12 with which engages the pawl 13 carried by the segment 14 which is provided with a number of teeth as 15 adapted to be engaged by the sector 16 pivoted on the framework at 17. This sector 16 is operated by means of the cam 18, mounted on the shaft 19, and with which cam engages the friction roll 20 of the lever 21 which is pivoted at 22, and through the connection 25 attached to the sector 16 and lever 21. This cam 18 makes one revolution in the present instance to each impression or to each complete reciprocation of the bed, and as it rotates, the lever 21 is oscillated there by moving the connection 25 back and forth, thus rocking the sector 16 and imparting the proper motion to the fountain roll. On each return stroke of the bed, the impression cylinder is moved up and out of the way of the form, while on the forward movement of the bed the impression cylinder is moved down so as to be in contact with the said form as it passes under the same.

The ink is transferred as is customary from the fountain roll to the distributing rolls or to the ink distributing table 75 on the reciprocating bed or to any other distributing surface desired by means of the ductor roll 26 which is operated in the usual manner from a cam as 27 conveniently mounted on the shaft 19 through the instrumentality of the levers 28 and 29.

Any suitable means may be utilized to trip and untrip the impression automatically once to each cycle of the machine. In the present instance, however, there is mounted on the standards 4 a shaft 30 connected by means of the toggle links 31 to a fixed bracket 32 on the framework. This shaft 30 is oscillated by means of the cam 33 conveniently mounted on the shaft 19 through the instrumentality of the rocker 34 pivoted at 35 and having a friction roll 36 engaging with the said cam 33. This rocker 34 further carries another friction roll 37 adapted to engage in the notch 38 of the lever 39 whose other end is connected by means of the link 40 to the shaft 30. As the cam 33 rotates the rocker 34 will push the lever 39 back and forth, thereby oscillating the shaft 30 and raising and lowering the impression cylinder at the proper periods. Suitable means as a spring 41 is used to balance the weight of the cylinder.

The means for interrupting the opera tion of the automatic means so as to maintain the parts tripped are preferably constructed as follows: Mounted on the stud 42 is a rocking and sliding cam 43 which is adapted to lift the lever 39 when it is desired to maintain the impression tripped. In order to properly effect this, there is mounted on the cam 33 or elsewhere, a projection 44 which is adapted to act on the cam surface 45 of the cam 43. As previously stated, this cam 43 both oscillates and slides and is provided with a pin or other member 46 upon which the free end of the lever 39 rests. This pin is of such length that it will always be in contact with the lever 39. But when it is not desired .to trip the cylinder, the cam is moved sidewise so as to bring the cam surface 45 out of the plane of the passing projection 44. When this cam surface 45, however, is in the plane of 44, the pin 46 tends to raise the lever 39 up so as to bring the roll 37 out of the notch 38 as shown in the drawing, whereby when the cam 33 moves the rocker 34, said roll 37 will move loosely in the slot 47 of the lever 39 without operating the latter. By this means the cylinder remains in its elevated position.

The means for controlling the action ofthe cam 43 as shown in the present instance are those commonly employed in the art and consist preferably of a foot treadle 48 adapted to act against the counter-weight 49 when depressed, and through the connection 5O pivoted on the stud 51 the cam 43 is moved sidewise so as to bring its surface 45 into and out of engagement with the projection 44. Preferably the parts are so arranged that the foot treadle can be depressed at any time during the operation of the machine so that at the proper moment said cam will be shifted sidewise into the path of the projection 44. This is preferablyeffected by mounting on the pin 42 which is used to move the cam sidewise a spring 53 which presses against a collar 54 mounted on the said spindle 42 so that when this spring 53 is compressed by the action of the connection whose two forked arms 55 bear against the said spring, power will be stored whereby when the projection 44 has passed the cam 43, the said cam will be moved sidewise into the plane of the said projection 44 so that when the latter comes around on the succeeding revolution it will encounter the cam surface 45 and tilt the cam 43. The foot pedal 48 is provided with a pin 56 which passes into the slot 57 of the sleeve 58 when the said foot treadle is depressed and by turningthe said pedal Mounted adjacent to the pawl 13 is a cam 60 provided with a toothed portion 61 and adapted to be turned by means of the sector 62 pivoted at 63 and rocked by means of the lever 39, when the latter is raised up by means of the cam 43, through the instrumentality of the bell crank 64 attached to the sector 62 by means of the connection 65. 66 which extends in over the cam 60 so that when the high surface of the same is moved in under the said pin 66, the said pawl will be lifted out of engagement with the ratchet 12 and consequently the rotation of the fountain roll will cease simultaneously with the tripping of the impression. The lever 39 is provided with a bushing 67 in which is located the projection 68 normally extending into the plane of the bell crank 64'by reason of the spring 69. This projection is The pawl 13 is provided with a pinprovided with a pin traveling in the slot 71 and when withdrawn by means of the handle 72 and the pin is turned into the slot 73, the said projection will be moved within the said bushing so as not to contact with the end of the bell crank 64. Obviously when the said projection protrudes into the plane of the said bell crank and the lever 39 is raised by the action of the cam 43, it will lift the said bell crank 64 up thereby turning the high surface of the cam 60 in under the pin 66 on the pawl whereby the fountain roll is kept in a state of rest. WVhen it is desired to trip the impression without tripping the inking mechanism, the projection 68 will be withdrawn from under the bell crank 64. WVhen the lever 39 therefore is raised up, it will not lift the bell crank and in this way the impression will be tripped while the inking mechanism remains operative. It will therefore be understood from the foregoing that the impression cylinder is moved periodically and automatically out of contact with the form, and in additlon to that it may be tripped so as to remain out of contact with the said form, thereby also lifting the pawl which drives the fountain roll out of contact with the ratchet on the fountain roll shaft so that no undue accumulation of ink takes place on the distributing rolls and form.

Of course it will be understood that this device can be applied to any kind of a press, whether rotary or bed and cylinder, in which the tripping mechanism is used for the impression cylinder.

It will also be understood that the fountain roll maybe continuously rotated instead of intermittently, and be controlled by the cam and pawl at such times as the ductor roller is in contact with the fountain roller.

What is claimed is:

1. In a printing machine, the combination of a multi-revolution impression cylinder, form carrying means, a fountain and fountain roll, a ductor roll, and a distributing surface, a ratchet and pawl for operating the fountain roll, a cam adapted to be moved in under a portion of the said pawl so as to lift the same out of contact with the ratchet, a sector for turning the cam, means for automatically tripping and untripping the impression once to each cycle of the machine, means for interrupting the operation of the automatic tripping means so as to maintain the impression tripped, means for causing the sector to move the cam to lift the pawl out of engagement with the ratchet so as to stop the supply of ink under control of the automatic tripping means but adapted to remain inoperative during the normal operation of the automatic tripping means and adapted to be actuated by the automatic tripping means when its normal operation is interrupted by the interrupting means.

2. In a printing machine, the combination with an impression cylinder, of form carrying means, a fountain and fountain roll, a ductor roll and a distributing surface, a ratchet and pawl for operating the fountain roll, a cam adapted to be moved in under a portion of the said pawl so as to lift the same out of contact with the ratchet, a sector for turning said cam, automatic means for tripping and untripping the impression once to each cycle of the machine, means for interrupting the operation of the automatic means so as to maintain the impression tripped, means whereby the operation of the interrupting means will cause the sector to move the cam to lift the pawl out of engagement with the ratchet, and means whereby the interrupting means can be operated without causing the sector to move the cam.

3. In a printing machine, the combination of an impression cylinder, form carrying means, a fountain and fountain roll, a ductor roll, and a distributing surface, a ratchet and pawl for operating the fountain roll, a cam adapted to be moved in under a portion of the said pawl so as to lift the same out of contact with the ratchet, a sector for turning said cam, means for maintaining the impression tripped, a connection for operating said sector, means where by the said connection for operating the sector is given a motion so as to cause the cam to lift the pawl out of engagement with the ratchet simultaneously therewith, and means whereby the impression can be maintained tripped without imparting motion to the connection operating the sector aforesaid.

4. In a printing machine, the combination of a multi-revolution impression cylinder, form carrying means, a fountain and fountain roll, a ductor roll, and a distributing surface, a ratchet and pawl for operating the fountain roll, a cam adapted to be. moved in under a portion of the said pawl so as to lift the same out of engagement with the ratchet, a sector for turning the cam, means for automatically tripping and untripping the impression once to each cycle of the machine, means for interrupting the operation of the automatic tripping means so as to maintain the impression tripped, means for causing the sector to move the cam to lift the pawl out of engagement with the ratchet so as to stop the supply of ink under control of the automatic tripping means but adapted to remain inoperative during the normal operation of the automatic tripping means and adapted to be actuated by the automatic tripping means' Signed at New York city this 11th day When its normal operation is interrupted by the interrupting means, and means whereby the impression can be maintained tripped Without causing the sector to move the cam to lift the pawl out of engagement with the ratchet.

of July 1905.

WALTER SCOTT.

Witnesses:

AXEL V. BEEKEN, IsIDoRE OSORIO. 

